Parse: allow trailing commas in array (not just object)

Author: sqs

parser_test.go

@@ -93,6 +93,9 @@ func TestParser(t *testing.T) {
 		if test.errors && errors == nil {
 			t.Errorf("%s: got no parse errors, want parse errors", label)
 		}
+		if !test.errors && errors != nil {
+			t.Errorf("%s: got parse errors %v, want no parse errors", label, errors)
+		}
 		if string(output) != test.want {
 			t.Errorf("%s: got output %s, want %s", label, output, test.want)
 		}

visitor.go

@@ -260,6 +260,9 @@ func (w *walker) parseArray() bool {
 			}
 			w.onSeparator(',')
 			w.scanNext() // consume comma
+			if w.scanner.Token() == CloseBracketToken && w.options.TrailingCommas {
+				break
+			}
 		} else if needsComma {
 			w.handleError(CommaExpected, nil, nil)
 		}